This story is off to a great start. I have seen that you decided to not continue it. At this point at the beginning, I do not know why. perhaps as the story progresses i will find out why, but I continue to throughly enjoy your writing!
In " and the Chamber of Secrets, I think Dumbledore mentions Aberforth when he's trying to comfort Hagrid about defending Buckbeak's case. In that conversation, Dumbledore says that Aberforth had once been criticized for practicing some unpleasant charms...and then adds as an afterthought that Aberforth's confidence might have resulted from the fact that he couldn't read well...
Mr. Intel Saturday 19th June 2004 09:17
1: Letters and Friends (Author Response)
For a complete look at who Aberforth is or is not, check out the Lexicon's entry on the subject.
I may or may not include some of their theory's regarding his "slightly odd brother". But I can assure you that my version of Aberforth will not be able to read. That doesn't mean he can't perform powerful magic, however.